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/***
This file is part of systemd.
Copyright 2014 Lennart Poettering
systemd is free software; you can redistribute it and/or modify it
under the terms of the GNU Lesser General Public License as published by
the Free Software Foundation; either version 2.1 of the License, or
(at your option) any later version.
systemd is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with systemd; If not, see <http://www.gnu.org/licenses/>.
***/
#include <errno.h>
#include <getopt.h>
#include <stdbool.h>
#include <stddef.h>
#include "log.h"
#include "macro.h"
#include "string-util.h"
#include "verbs.h"
#include "virt.h"
int dispatch_verb(int argc, char *argv[], const Verb verbs[], void *userdata) {
const Verb *verb;
const char *name;
unsigned i;
int left;
assert(verbs);
assert(verbs[0].dispatch);
assert(argc >= 0);
assert(argv);
assert(argc >= optind);
left = argc - optind;
name = argv[optind];
for (i = 0;; i++) {
bool found;
/* At the end of the list? */
if (!verbs[i].dispatch) {
if (name)
log_error("Unknown operation %s.", name);
else
log_error("Requires operation parameter.");
return -EINVAL;
}
if (name)
found = streq(name, verbs[i].verb);
else
found = !!(verbs[i].flags & VERB_DEFAULT);
if (found) {
verb = &verbs[i];
break;
}
}
assert(verb);
if (!name)
left = 1;
if (verb->min_args != VERB_ANY &&
(unsigned) left < verb->min_args) {
log_error("Too few arguments.");
return -EINVAL;
}
if (verb->max_args != VERB_ANY &&
(unsigned) left > verb->max_args) {
log_error("Too many arguments.");
return -EINVAL;
}
if ((verb->flags & VERB_NOCHROOT) && running_in_chroot() > 0) {
log_info("Running in chroot, ignoring request.");
return 0;
}
if (name)
return verb->dispatch(left, argv + optind, userdata);
else {
char* fake[2] = {
(char*) verb->verb,
NULL
};
return verb->dispatch(1, fake, userdata);
}
}
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